MyArray = [[zeros(Int, k) for n = 1:binomial(J, k)] for k = 1:K]
seems to do what you want I think. Using 2 nested 1-d comprehensions instead of a single 2-d comprehension. — Mike On Monday, 21 September 2015 10:37:06 UTC+2, Alan Crawford wrote: > > > Thanks Tomas. If I do: > > Y = [Array(Int64,n) for n in map(k -> binomial(J,k), 1:K)] > > Then Y[1] gives the desired result (i.e. Y[1][k] is a length 1 vector). > However, the issue for Y[2] and above. For example, if I do Y[2][k] where > k∈[1,binomial(J,2)] > then i get a length 1 vector, whereas I would like length 2 vector. > Similarly for Y[3][k] I would like a length 3 vector. > > > On Monday, 21 September 2015 09:23:56 UTC+1, Tomas Lycken wrote: >> >> Ah. >> >> Maybe [Array(Int64,n) for n in map(k -> binomial(J,k), 1:K)] is what >> you’re looking for? >> >> // T >> >> On Monday, September 21, 2015 at 10:18:31 AM UTC+2, Alan Crawford wrote: >> >> The lower case k is intentional. I didn't want such a 'large' array as >>> the one created when I use K because large parts of that array would be >>> redundant. Ideally, I want this array to be as small as possible, >>> especially since J and K might be quite a bit larger than in the example. >>> >>> On Monday, 21 September 2015 09:13:53 UTC+1, Tomas Lycken wrote: >>>> >>>> Are you sure that’s not just a typo between k and K (note the case >>>> difference)? >>>> >>>> This works for me: >>>> >>>> J=10 >>>> K=3 >>>> MyArray = [Array(Int64,k) for k in 1:K, n in 1:binomial(J,K)] >>>> >>>> // T >>>> >>>> On Monday, September 21, 2015 at 10:08:13 AM UTC+2, Alan Crawford wrote: >>>> >>>> Hi, >>>>> >>>>> I'd like to be able to define an array of vectors where the number of >>>>> vectors in the array is linked to the length of the vector. For example, >>>>> I >>>>> want to be define an array with say 10 scalars, 45 length 2 vectors, 120 >>>>> length 3 vectors, .... and so on. Intuitively, I thought the following >>>>> code >>>>> might achieve this: >>>>> >>>>> J=10 >>>>> K=3 >>>>> MyArray = [Array(Int64,k) for k in 1:K, n in 1:binomial(J,k)] >>>>> >>>>> >>>>> However, it seems i cannot use k to define the number of element >>>>> indexed by n. >>>>> >>>>> I was wondering if anyone knew how to create the desired array? >>>>> >>>>> Thanks >>>>> Alan >>>>> >>>> >>>> >>> >> >